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Theteacherandwriterisgoingtogiveusatalk.问谓语动词为什么要用is而不用are?Thebrotherandsisterarebothdoctors.问为什么只一句的谓语动词要用are而不用is?

题目详情
The teacher and writer is going to give us a talk.问谓语动词为什么要用is而不用are?
The brother and sister are both doctors.问为什么只一句的谓语动词要用are而不用is?
▼优质解答
答案和解析
The teacher and writer指的是同一个人这个人既是老师也是作家,而哥哥和姐姐是两个人,一个单数一个复数,